CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
NET REVENUES		$ 109,664	$ 89,188
COST OF REVENUES		53,184	43,714
GROSS PROFIT		56,480	45,474
OPERATING EXPENSES:
Research and development		19,152	17,946
Sales and marketing		13,473	13,017
General and administrative		8,761	8,390
Total operating expenses		41,386	39,353
INCOME FROM OPERATIONS		15,094	6,121
OTHER INCOME		1,777	1,152
INCOME BEFORE INCOME TAXES		16,871	7,273
PROVISION FOR INCOME TAXES		985	40
NET INCOME		$ 15,886	$ 7,233
EARNINGS PER SHARE:
Basic (in dollars per share)		$ 0.54	$ 0.25
Diluted (in dollars per share)	[1]	$ 0.53	$ 0.25
SHARES USED IN PER SHARE CALCULATION:
Basic (in shares)		29,602	28,951
Diluted (in shares)		30,134	29,446

[1] The Company includes the shares underlying performance-based awards in the calculation of diluted earnings per share if the performance conditions have been satisfied as of the end of the reporting period and excludes such shares when the necessary conditions have not been met. The Company has excluded the shares underlying the outstanding performance-based awards in the 2020 and 2019 calculations as the shares were not contingently issuable as of the end of the reporting periods.